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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efac51c35b9fcc00e04c45c90aeb9b31ec588a8ddf39f03e9ca5b2b5503dcd7e' 
  AND token = '7vu8a5Pj0qyn5x4PZuGnNS6y7ApBp+8YR2fTWFVRiqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}